T/SXJD 14-2020 Precision current transformer technical specifications

Scope

Scope: This standard specifies the terms and definitions, conditions of use, requirements, tests, inspection rules, packaging, and storage and transportation for precision current transformers. This standard applies to current transformers with a rated frequency of 50Hz (or 60Hz), a rated voltage of 35kV or lower, an accuracy class of 0.005(S) to 0.1(S), and those used as standard instruments and for precision measurement. Main technical content: The existing domestic standards ZBY 097-82 "Technical Conditions for Precision Current Transformers" and JB/T 5472-1991 "Instrumental Current Transformers" are only designed for standard transformers, without specifications for precision measurement, and their accuracy grades are not high enough. The test items are also incomplete, failing to meet the current requirements for metrology, verification, and on-site inspection. Therefore, the title of the project is "Technical Conditions for Precision Current Transformers". 1. Scope of application: This standard applies to current transformers with a rated frequency of 50Hz or 60Hz, a rated voltage of 35kV or lower, and an accuracy class of 0.005(S) to 0.1(S) used as standard transformers and for precision measurement. It does not apply to two-stage current transformers and current comparators. 2. Main technical indicators: Based on the current needs for metrology, verification, and on-site inspection of current transformers, the accuracy classes have been expanded to include 0.005(S), 0.01(S), 0.02(S), 0.05(S), and 0.1(S).

Development Information

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